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Lyretail cichlid assembly and gene annotation

The lyretail cichlid (Neolamprologus brichardi) is a species of cichlid endemic to the alkaline waters of Lake Tanganyika in East Africa. It has been the subject of numerous studies on fish behaviour, as it is one of the few substrate-spawning cichlid that schools; it also utilizes a collective nursery for multi-generational rearing of fry.


The NeoBri1.0 assembly was submitted by Broad Institute on December 2011. The assembly is on scaffold level, consisting of 118,197 contigs assembled into 9,099 scaffolds. The N50 size is the length such that 50% of the assembled genome lies in blocks of the N50 size or longer. The N50 length for the contigs is 13,047 while the scaffold N50 is 4,430,025.

Gene annotation

The gene annotation process was carried out using a combination of protein-to-genome alignments, annotation mapping from a suitable reference species and RNA-seq alignments (where RNA-seq data with appropriate meta data were publicly available). For each candidate gene region, a selection process was applied to choose the most appropriate set of transcripts based on evolutionary distance, experimental evidence for the source data and quality of the alignments. Small ncRNAs were obtained using a combination of BLAST and Infernal/RNAfold. Pseudogenes were calculated by looking at genes with a large percentage of non-biological introns (introns of <10bp), where the gene was covered in repeats, or where the gene was single exon and evidence of a functional multi-exon paralog was found elsewhere in the genome. lincRNAs were generated via RNA-seq data where no evidence of protein homology or protein domains could be found in the transcript.

In accordance with the Fort Lauderdale Agreement, please check the publication status of the genome/assembly before publishing any genome-wide analyses using these data.

More information

General information about this species can be found in Wikipedia.



AssemblyNeoBri1.0, INSDC Assembly GCA_000239395.1, Dec 2011
Base Pairs847,910,432
Golden Path Length847,910,432
Annotation providerEnsembl
Annotation methodFull genebuild
Genebuild startedMay 2018
Genebuild releasedJul 2018
Genebuild last updated/patchedJul 2018
Database version104.1

Gene counts

Coding genes23,596
Non coding genes776
Small non coding genes759
Long non coding genes3
Misc non coding genes14
Gene transcripts32,961


Genscan gene predictions36,842

About this species